Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 787 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — density, dissolving, capillary action, light bending, air pressure, push-back, air resistance or condensation. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same straw”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.🔮 Predict: the string slopes uphill. What happens? (a) it travels farther (b) it goes backward first (c) it speeds up (d) it travels less far
3. 3.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a battery cell (c) turmeric powder (d) a balloon
4. 4.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a battery cell (c) a clear glass of water (d) a sunny window
5. 5.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a compass needle (c) a vacuum cleaner (d) a fridge magnet
6. 6.🔍 Which is the odd one out? (a) a feather (b) a stone (c) a toy parachute (d) a fluff of cotton
7. 7.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “how much of each liquid”? (a) we measure it (b) we change it (c) we keep it the same
8. 8.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) cooking oil (b) turmeric powder (c) a spoon (d) honey
9. 9.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the stirring is what we measure. (a) False (b) True
10. 10.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a sheet of white paper (c) a sunny window (d) turmeric powder
11. 11.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) over a sink or bucket (d) near a plug point
12. 12.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the length of the blades”? (a) we change it (b) we keep it the same (c) we measure it
13. 13.🔍 Which is the odd one out? (a) a coin (b) a paper helicopter (c) a feather (d) an open sheet of paper
14. 14.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) in the water layer (b) at the very bottom (c) in the oil layer (d) on top of the oil
15. 15.🔍 Which is the odd one out? (a) an ice-cream stick (b) a piece of thermocol (c) an ice cube (d) an iron nail
16. 16.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the size of the bowl”? (a) we keep it the same (b) we measure it (c) we change it
17. 17.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a clear glass of water (c) a balloon (d) a sunny window
18. 18.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the cap is sticky (c) the bottle is magnetic (d) air inside pushes back
19. 19.☀️ What is white sunlight really made of? (a) only yellow light (b) many colours mixed (c) tiny drops of water (d) tiny bits of dust
20. 20.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the kind of paper is what we measure. (a) True (b) False
21. 21.🧺 Which of these is not needed for the water rainbow? (a) a battery cell (b) bright sunlight (c) a clear glass of water (d) a sunny window
22. 22.True or false: a magnet is needed for the paper helicopter. (a) True (b) False
23. 23.🌼 Why do the petals keep pulling water up the stem? (a) the stem is hot (b) petals like colour (c) petals lose water to air (d) petals are magnetic
24. 24.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
25. 25.True or false: a mirror is needed for the dissolving test. (a) True (b) False
26. 26.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) air pushes it up (c) juice likes plastic (d) the straw is magnetic
27. 27.🛟 Which is the safe way to do the float-or-sink test? (a) play near a deep pond (b) run around the tub (c) wipe up spills at once (d) leave water on the floor
28. 28.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is what we measure. (a) True (b) False
29. 29.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “distance it travels”? (a) we measure it (b) we keep it the same (c) we change it
30. 30.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the stirring (b) time to dissolve (c) the amount of sugar (d) the water temperature
31. 31.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a tall clear glass (b) a spoon (c) cooking oil (d) a magnet
32. 32.🧺 Do we need a clock or timer for the dissolving test? (a) not needed (b) needed
33. 33.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) the order of pouring (b) the order of the layers (c) the same glass (d) the same three liquids
34. 34.🧺 Which of these is needed for the float-or-sink test? (a) a balloon (b) turmeric powder (c) a tub of water (d) a mirror
35. 35.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is kept the same? (a) the amount of water (b) how many drops form (c) sun or shade
36. 36.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) how big we blow it (b) the same string (c) distance it travels
37. 37.🧺 Which of these is not needed for the balloon rocket? (a) a drinking straw (b) a mirror (c) a long string (d) a balloon
38. 38.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the kind of sugar”? (a) we change it (b) we keep it the same (c) we measure it
39. 39.🧺 Do we need a magnet for the float-or-sink test? (a) not needed (b) needed
40. 40.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a mirror (b) a long string (c) a drinking straw (d) two chairs

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